Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

I take that back, i tried it again and the computer that doesn't work DOES work on the switch if it's the only one.

Only one can work at a time on the switch.

The one that does not work has an IP address of 169.254.146.179.
From the link above it says "a “169.” is an address that Windows will simply make up in order to have an address – but most things won’t work."

doctore, he says he has a modem, he does not say he has a router, there in lies the problem.

Still waiting on the make and model of the modem.

The modem connects to a cable/wire from the outside, bringing in Internet data (email, You Tube videos, Google search results, files) from all over the world. A different wire that goes from your modem to your computer delivers your Internet requests and activity to your computer and monitor. What you see is what you asked for. Thanks, modem!

In case you're wondering, you can't simply plug that cable from your Internet Service Provider directly into your computer. It just doesn't work that way. You NEED that modem between the cable and your computer. No modem, no Internet.

You could go online using just your modem and computer, but there's a reason to think twice. Modems are useful, but they are not smart pieces of hardware. They can't do much when it comes to providing Internet safety, like keeping hackers away. Also, one modem connects to only one computer.

So with just a modem, your computer is at risk. You'll need to rely on special computer software (anti-virus programs, etc.) to fight of bad stuff coming in from online (computer viruses and such). And make no doubt, there's plenty of that out there.

Enter the router, a good companion for your modem, your computer and you. With a few wires and connections and installing some software, you're modem, router and computer get connected.

A router does two special things by leeching on to your modem. (Well, three.)

It can take the digital signal from your modem (which the modem gets from the cable company's cable) and share it with (route it to) other computers in the house. You now have a computer network at home.

In order to do this, the router monkeys with and modifies the IP address on your computer(s). Just by doing that, it automatically makes it hard for hackers to now get at your computer. In fact, it's harder to target any specific computer linked to the router.

A wireless router allows you to connect your Internet connection at home with any wireless device, such as a laptop, Smartphone or iPad. (Make a note: you just need to make sure your wireless network is secure. That information comes with the router.)

To summarize: A modem will only allow 1 computer at a time to go out to the internet.

Local Area Connection doesn't have a valid IP configuration

Local area connection doesn't have a valid IP configurationHey everyone,
I'm knew to the forum :) First time posting.
So my problem is that we just got a knew ISP like 4-5weeks ago and they gave us the modem and it only has 1 port so we bought a TP-LINK TL-WR841N. It was all good until I got the error massage one morning that no valid IP configuration...

Network & Sharing

Local Area Connection Doesn't have a valid IP configuration.Hi, I have a windows 7 64bit PC. Recently my internet cut out and it sait "Unidentified network No Internet access". I tried the troubleshooter and it told me that my Local Area Connection Doesn't have a valid IP configuration. I have searched up many solutions and none of them worked. So can you...

Local Area Connection doesn't have a valid IP configurationHi. At home i only have a wifi internet connection and i dont have a reciever for my desktop so i was using my laptop to share the internet connection through a Lan cable
But today all of a sudden my desktop cant connect to the internet anymore because
"Local Area Connection doesn't have a valid...

Network & Sharing

Local Area Connection doesn't have valid ip configurationI've been at this all day its a brand new computer(that might be the problem right there but i doubt it) I tried renew and release method and have unidentified network Public network as well even though i do not have wireless on the comp. The local area connection says no network access as well....

Network & Sharing

Local Area Connection doesn't have a valid IP configurationRecently, I can't connect to the internet. when I tried to troubleshoot the problem, it gave me the following line :
"Local Area Connection doesn't have a valid IP configuration"
I have two PCs and when I connect the mothem/router to the second PC, everything is okay and internet is on (So I am...